Treatment the effluents by adsorption-coagulation with compounds of iron and aluminum prepared by indirect electrocoagulation

In morocco,the demand for water is growing continuously in conjunction with demographic change and water consuming activities. in the textile sector,there is a need for recycling of wastewater containing dying compounds. the present study aims to removing pollutants in the case of a colorful effluent at neutral ph,and the optimization of various experimental parameters influencing them. the first step was devoted to the synthesis of adsorbent-coagulant structures by indirect electrocoagulation process using iron or aluminum electrodes in an electrolytic solution of sodium chloride (10-2 mol l-1),at neutral ph. in a second step,different mix compounds have been prepared (100% al,75% al and 25% fe,50% al and 50% fe,25% al and 75% fe,100% fe). these mixtures were then used for the treatment of solutions polluted by a textile dye (blue trypan),phenol,oxalic acid and cadmium sulfate. the xrd analysis of these structures showed that the dominant presence of aluminum hydroxides and oxides (al(oh)3 and al2o3.3h2o) and iron oxides (mgfe2o4 and fe3o4) and as a mixed product (mgal0.2fe1.8o4). the study of zeta potential and behavior of colloidal particles showed that they are mainly positively charged at neutral ph. the removal efficiencies of cadmium,oxalic acid,and phenol in the polluted solutions were specific to the produced structures. finally,all the prepared compounds were efficient for the removal of the dye (blue trypan).